'''John Hall Gladstone''' Fellow of the Royal Society|FRS
(7 March 1827 – 6 October 1902) was a UK|British chemist
He served as President of the Physical Society
between 1874 and 1876 and during 1877–1879 was President of the Chemical Society
. Apart from chemistry, where one of his most notable publications was on bromination
of rubber, he undertook pioneering work in optics and spectroscopy.